JPH0239385Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an office desk used for mounting OA equipment such as an office computer.

Recently, office automation equipment such as office computers has been introduced into offices in order to automate office processing. And this kind of
For a desk on which OA equipment is placed, it is necessary to freely change the height of the desk top plate to make it most convenient for use, depending on the shape and dimensions of the OA equipment and the physique of the person operating the OA equipment.

Therefore, in order to meet this demand, a pair of left and right legs, which are erected at appropriate intervals, are equipped with a front desk support on the front side and a rear desk support on the rear side, which can be raised and lowered freely. A front desk top plate is installed between the upper surfaces of the pair of left and right front desk supports to form the front desk, while a rear desk top plate is installed between the upper surfaces of the left and right pair of rear desk supports. Some office desks include a rear desk mounted at a higher position than the top plate of the front desk, and the front desk and the rear desk are configured to be moved up and down by separate motors. being developed.

The present invention provides an office desk in which the front desk and the higher rear desk are raised and lowered by separate motors, in which the top plate of the rear desk is
By configuring the desk to be movable back and forth, the range of use as an office desk is expanded.

However, in addition to moving the front desk and rear desk up and down using separate motors, configuring the rear desk top plate located above the front desk top plate to be movable in the front-back direction is difficult. When either the front desk or the rear desk is raised or lowered with the top plate of the rear desk pulled out to the top side of the top plate of the front desk, the top plates of both desks may collide with each other. In other words, when the front desk is lifted with the top plate of the rear desk pulled out to the top side of the top plate of the front desk, the top plate collides with the bottom surface of the top plate of the rear desk, and the upward movement by the motor is stopped. In addition, when the rear desk is lowered with the top plate of the rear desk pulled out to the top side of the top plate of the front desk, the top plate collides with the top surface of the top plate of the front desk, and the downward movement by the motor stops. do. However, since the lifting motors for both desks are still operating even after the collision, a large load will be applied to the motors and the lifting mechanism, resulting in burnout of the motors and damage to the lifting mechanism. It was hot.

Therefore, the present invention automatically stops the operation of the front desk lifting motor when the top plate approaches the top plate of the rear desk when the front desk is raised, and when the top plate approaches the position of the rear desk top plate when the rear desk is lowered. The above-described problem is avoided by automatically stopping the operation of the rear desk lifting motor when the user approaches a certain position on the top plate of the front desk.

The present invention will be explained below with reference to drawings of embodiments. In the drawings, 1 and 1 are hollow box-shaped frames 2.
shows a pair of left and right legs connected at appropriate intervals, both legs 1 are hollow and have front desk supports 3, 3 on the front side, and rear desk supports 4 on the rear side. ,4
are inserted so as to be vertically movable, and a top plate 5 for the front desk is mounted between the upper surfaces of the two front desk supports 3, 3 to form a front desk 6, while the two rear desk supports 4 A horizontal member 7 is installed between the horizontal members 7 and 4, and a top plate 8 for a rear desk is mounted on the upper surface of the horizontal member 7 through a plurality of rails 9, 9 extending perpendicularly to the horizontal member 7 so as to be movable back and forth. In particular, the rear desk 10 is configured. At this time, the top plate 8 of the rear desk 10 is the top plate 5 of the front desk 6.
It is located above by an appropriate height.

Inside the box-shaped frame 2 between the legs 1, 1,
Two shafts 11 and 12 are supported in parallel, and one shaft 1
1, the rotation of the front desk lifting motor 13 provided in the box-shaped frame 2 is decelerated and transmitted by a worm gear (not shown) in the gear box 14, and the other shaft 13 is also connected to the box-shaped frame. The gearbox 16 controls the rotation of the rear desk lifting motor 15 provided in the gearbox 16.
The deceleration is transmitted by a worm gear (not shown) inside.

On the other hand, a screw shaft 17 for raising and lowering the front desk and a screw shaft 18 for raising and lowering the rear desk are pivotally supported in the legs 1, 1 in parallel with both the supports 3, 4, and screws for raising and lowering both the front desks axis 1
The upper ends of the shafts 18 and 17 are connected to both ends of the one shaft 11 through worm gears (not shown) in the gear boxes 19 and 19, and the upper ends of the screw shafts 18 and 18 for raising and lowering the rear desks are , which is connected to both ends of the other shaft 13 for deceleration via worm gears (not shown) in gear boxes 20, 20, and is attached to a nut piece 21 integrally protruding from the front desk supports 3, 3. The screw shaft 17 for raising and lowering the front desk is connected to the rear desk supports 4, 4.
The front desk lifting motor 13 is connected to the rear desk lifting motor 13 via the control circuit 23 by screwing the rear desk lifting screw shafts 18 to the nut pieces 22 integrally provided from the rear desk lifting screw shafts 18. Operation forward/reverse switch 24
If the front desk 6 is rotated in the forward direction by the operation, the front desk 6 will rise, and if it is rotated in the reverse direction, the front desk 6 will be lowered. The configuration is such that the rear desk 10 is raised when the operating forward/reverse switch 26 is rotated in the forward direction, and is lowered when the forward/reverse switch 26 is rotated in the reverse direction.

A box 27 is fixed to the horizontal member 7 that connects both supports 4, 4 in the rear desk 10, and a drum 29 rotated by a motor 28 is installed inside the box 27.
is provided so that its axis is perpendicular to the moving direction of the top plate 8 in the rear desk 10, and the drum 29
One end 30a of a linear body such as a wire 30 or a flat belt wound around the outer circumference of the top plate 8 is fixed to the lower surface of the front end of the top plate 8, and the other end 30b is fixed to the lower surface of the rear end of the top plate 8, and the motor 28 is When the forward/reverse switch 32 for forward/backward movement operation connected to this via the control circuit 31 is operated to rotate in the direction shown by the solid line arrow in FIG. 5, the top plate 8 moves forward, and in the direction shown by the dotted line arrow. When the top plate 8 is rotated in the opposite direction, the top plate 8 is configured to move rearward (in this case, the top plate 8 in the rear desk 10 may be configured to move back and forth using another mechanism such as a rack and pinion gear). good).

And the nut piece 2 in the front desk support 3
A limit switch 33 with a contact piece 34 is installed at an appropriate location such as 1, and a nut piece 2 on the rear desk support 4.
Similarly, limit switches 35 with contact pieces 36 are provided at appropriate locations such as the second one. In this case, when the front desk 6 approaches a predetermined height H at which the top plate 5 does not collide with the top plate 8 of the rear desk 10 when the front desk 6 is raised, the contact piece of the limit switch 33 on the front desk is turned on. 34 touches the limit switch 35 etc. on the rear desk and switches it.
ON, and when the rear desk 10 is lowered, the top plate 8
When the contact piece 36 of the limit switch 35 on the rear desk approaches the predetermined height H at which it does not collide with the top plate 5 of the front desk 6, the contact piece 36 of the limit switch 35 on the rear desk switches the limit switch 33 on the front desk.
It is configured so that the switch is turned on when it comes into contact with the
By turning on the limit switch 33 in the front desk, the rotation of the motor 13 for raising and lowering the front desk is stopped in priority to the operation of the forward/reverse switch 24 for raising and lowering the front desk,
When the limit switch 35 in the rear desk is turned on, the rotation of the motor 15 for raising and lowering the rear desk is stopped in priority to the operation of the forward/reverse switch 26 for lifting and lowering the desk (in this case, both limit switches are turned on). Contact piece 34 in 33, 35,
36 may be in contact with members constituting the front desk 6 and the rear desk 10).

In addition, the front desk up/down operation forward/reverse switch 24,
The forward/reverse switch 26 for lifting and lowering the rear desk and the forward/reverse switch 32 for moving the top plate 8 of the rear desk back and forth are connected to the front desk 6.
A digital display unit 36 is provided in the front right corner of the top plate 5 and near the switch group to display the height of the front desk 6 and rear desk 10 from the floor. In the embodiment, there is only one digital display section 36, and when the forward/reverse switch 24 for front desk lifting/lowering operation is operated, the height of the front desk 6 is displayed, and when the forward/reverse switch 26 for rear desk lifting/lowering operation is operated, the height of the front desk 6 is displayed. (10 heights are automatically switched and displayed), and in the figure, reference numeral 3
Reference numerals 7 and 38 indicate limit switches for regulating and setting the upper and lower limits of the rise of the front desk 6, reference numerals 39 and 40 limit switches for regulating and setting the upper and lower limits of the rise and fall of the rear desk 10, and numerals 41 and 42 for the top plate of the rear desk 10. This is a limit switch that regulates and sets the positions of both ends of the forward and backward movement of 8.

In this configuration, the height of the front desk 6 and the rear desk 10 can be adjusted individually by operating the forward/reverse switch 24 for raising/lowering the front desk and the forward/reverse switch 26 for raising/lowering the rear desk. Since the top plate 8 in 10 can be freely pulled out to the top side of the top plate 5 of the front desk 6, the top plate 8 of the rear desk 10
When OA equipment is placed and the top plate 8 is moved rearward, the top surface of the top plate 5 on the front desk 6 is opened, so the front desk 6 can be used for general office use, and the rear desk can be used for general office purposes. By pulling out the top plate 8 of No. 10 towards you, you can operate the OA equipment.
This allows the use and functionality of an office desk to be expanded.

The height of the front desk 6 and the height of the rear desk 10 are:
As mentioned above, it can be freely and easily adjusted by operating the motors 13 and 15, but when the front desk 6 is raised to adjust its height, the top plate 5 of the rear desk 10 is pulled out toward the front. When approaching the top plate 8 of the front desk 6, the rotation of the motor 13 for raising and lowering the front desk is automatically stopped by turning on the limit switch 33 of the front desk 6, so that the top plate 5 is prevented from colliding with the top plate 8 of the rear desk. In addition, when the rear desk 10 is lowered to adjust the height of the rear desk 10, if the top plate 8 in the drawn state approaches the top plate 5 of the front desk 6, the rear desk 1
Since the rotation of the motor 15 for raising and lowering the rear desk is automatically stopped by turning on the limit switch 35 at 0, the top plate 8 does not collide with the top plate 5 of the front desk.

As described above, in the present invention, a pair of left and right legs erected at appropriate intervals are provided with a support for the front desk on the front side and a support for the rear desk on the rear side, respectively, so as to be able to rise and fall freely. A front desk is constructed by mounting a front desk top plate between the upper surfaces of the pair of left and right front desk supports, while a rear desk top plate is mounted between the upper surfaces of the left and right pair of rear desk supports. In an office desk, the desk is mounted at a higher position than the desk top to form a rear desk, and the front desk and the rear desk are moved up and down by separate motors, wherein The top plate is configured to be movable in the longitudinal direction of the desk, and the front desk is equipped with a limit switch that stops the motor for raising and lowering the front desk when it comes into contact with the other rear desk as the front desk rises. Each of the rear desks is provided with a limit switch that stops the motor for raising and lowering the rear desk when the rear desk comes into contact with the other front desk as the rear desk lowers. When the top plate approaches the position of the top plate on the rear desk, the operation of the front desk lifting motor is automatically stopped, and when the top plate approaches the position of the top plate of the front desk when lowering the rear desk. Since the operation of the rear desk lifting motor is automatically stopped, when the front and rear desks are raised and lowered by the motors, the top plates of both desks do not collide with each other. There is no burnout or damage to the elevating mechanism, and the height of both desks can be adjusted extremely safely.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view of the entire desk, Fig. 2 is a perspective view when the desk top is removed, Fig. 3 is a perspective view of the lifting mechanism, and Fig. 4 is a perspective view of the desk. 2
Figure 5 is an enlarged sectional view of Figure 2.
FIG. 6 is an enlarged cross-sectional view, FIG. 6 is a cross-sectional view taken from - in FIG. 5, and FIG. 7 is a circuit diagram. 1... Legs, 3... Support for front desk, 4... Support for rear desk, 5... Top plate for front desk, 6... Front desk, 8... Top plate for rear desk, 9... Rail , 10... Rear desk, 13...
...Front desk lifting motor, 15... Rear desk lifting motor, 24... Front desk lifting/lowering operation switch, 26...
Rear desk lift/lower operation switch, 33, 35...limit switch.

Claims (1)

[Scope of utility model registration request] A pair of left and right legs erected at appropriate intervals are provided with a front desk support on the front side and a rear desk support on the rear side, respectively, so that they can be raised and lowered freely. A front desk top plate is installed between the upper surfaces to form a front desk, while a rear desk top plate is installed between the top surfaces of the pair of left and right rear desk supports higher than the front desk top plate. In an office desk configured such that the front desk and the rear desk are moved up and down by separate motors, the top plate of the rear desk is mounted at the front and rear desks of the desk. On the other hand, the front desk is equipped with a limit switch that stops the motor for raising and lowering the front desk when the front desk comes into contact with the other rear desk as the front desk rises. An office desk comprising a limit switch that stops a motor for raising and lowering the rear desk when the rear desk comes into contact with the other front desk as the rear desk lowers.